West Richland Washington Climate Data

Monthly Average Climate Data for West Richland Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-2.1 °C5.1 °C28.7 mm
February-1.6 °C8.8 °C20.83 mm
March1.3 °C14.3 °C16.51 mm
April4.3 °C18.8 °C16.76 mm
May8.5 °C23.9 °C19.81 mm
June12.1 °C27.7 °C16.76 mm
July15.2 °C32.8 °C4.06 mm
August14.8 °C32.3 °C7.37 mm
September10.4 °C26.9 °C5.33 mm
October4.9 °C18.7 °C17.02 mm
November0.6 °C10.3 °C24.38 mm
December-2.2 °C4.8 °C30.48 mm
Annual5.5 °C18.7 °C208.01 mm

Climate Data for West Richland Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBWk - Cold Desert Climate
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